The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 11, 1991
Filed:
Oct. 25, 1990
Applicant:
Inventors:
Yasuo Kitabatake, Nara, JP;
Tadashi Nakamura, Nara, JP;
Yoshiaki Takahashi, Nara, JP;
Kazuya Maeda, Osaka, JP;
Assignee:
Sharp Kabushiki Kaisha, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03G / ;
U.S. Cl.
CPC ...
430137 ; 430138 ; 427195 ;
Abstract
A toner for use in electrophotography comprises particles composed of an inner core containing a pigment and surrounded by an outer layer which contains a conductive substance to reduce its resistance but is free of pigments so as to improve the stability of its charging characteristics.